significant p* 0.001, except for in humans, in which p*0.05. We found that the average metabolic rates of the montreme animals measured at 5 C were significantly different from the marsupial mammals at 5 C (t=5.02, df=18, p*0.001). The average metabolic rates of the montreme animals measured at 5 C were significantly different from the placental mammals at 5 C (t=3.38, df=18, p*0. 01). Furthermore, we found that the average metabolic rates of the marsupial animals measured at 5 C were significantly different from the placental mammals at 5 C (t=10.99, df=18, p*0.001). The average oxygen consumption rate (in ml O2/g/min) for the 5g crab was 20.45 at 8.5C and 92.66 at 23.5C. The average oxygen consumption rate for the 25g crab was 12.50 at 8.5C and 62.26 at 23.5C. Figure 2 shows the effects of temperature and body size on oxygen consumption in the crab. Figure 2. The effects of temperature and body size on oxygen consumption in the crab.We found that for both crabs, the average weight-specific oxygen consumption rates at the two temperatures were significantly different p*0.001. At 8.5C and 23.5 C, the average oxygen consumption rates of the 5g crab compared to the 25g crab were significantly different respectively (t=-4.32, df=18, p*0.001) (t=-20.70, df=18, p*0.001). Works CitedWitz, B. W. 2000. Animal Physiology Laboratory Manual. Nazareth College, Rochester. 174 pp....